Connecting-rod-testing appliance



July.3, 1923'. 1,460,548

A. J. KOON ET AL v CONNECTING ROD TESTING APPLIANCE.

Fild Nov. 21. 1-921 Q 1E: H Xi! H v l I lrmeni'ors Hrihumllioon James E.GOH'ms.

Patented July 3, 1923.

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ARTHUR J. KOON, JOHN HOOGERHYDE, AND JAIVIES E. COLLINS, 0F GRAND RAPIDS, MICHIGAN; SAID KOON ASSIGNOR TO SAID .HOOGERHYDE AND'SAID COLLINS.

CONNECTING-ROD-TESTING APPLIANCE.

' Application filed November 21, 1921. Serial No. 516,631.

the art to which it appertains to make and use the same;

This invention relates to an appliance for testing connecting rods for internal combustion engines, such as are used in connecting the pistons to the crank shaft in engines of this character. It is very necessary that a connecting rod shall be true, otherwise the bearing either on the crank shaft or on the piston pin will soon become damaged and worn with resultant looseness and, in all probability, a quick destruction of the connecting rod, so far as its usefulness is concerned. Our invention has for its primary object and purpose, the production of a relatively simple appliance by means of which, connecting rods of different lengths and sizes may be very quickly tested as to'their fitness for service, any defect in bearing alinement being immediately discovered. A further object of the invention is to make the appliance quickly adjustable for different lengths of connecting rods to be tested, and at the same time make the appliance such that it may be economically produced and in service be'very strong and durable and very effective for the attainment of the ends stated. Other objects and purposes will be set forth as the description progresses of the construction embodying the invention, and which is shown in the accompanying drawing, in which,

Fig. 1 is a plan View of the appliance.

Fig. 2 is an end elevation thereof.

Fig. 3 is a front elevation, and Fig. 4 is an end elevation opposite to that shown in Fig. 2.

Like reference characters refer to like parts in the different figures of the drawing.

In the construction of the appliance, a relatively long base 1 is provided from which at one end, two spaced apart wide posts 2 extend upwardly, each at its upper end being formed with a deep V-shaped notch or recess 3, as shown- The base 1 at one end has a downturned lip l and each of the posts 2 at itslower end has a. downwardly extending narrow upporting lip 2 whereby the base'is supported substantially at three points and no strain is set up in the base from placing the same on a more or less irregular surface, so that distortion of the base cannot occur. Two spaced apart parallel ways or guides at are formed lengthwise of and at opposite sides of the base, on which a block 5 is slidably mounted, it having two spaced apart upwardly extending posts 6, which are likewise formed at their upper ends with V-shaped recesses 7 smaller than recesses 3.

An arbor 8, corresponding to the wrist pin of a crank shaft is adapted to be laid in the recesses 3. A smaller arbor 9, correspond ing to the piston pin connecting the piston to the connecting rod is adapted to be laid in the recesses 7. The recesses 3 and 7 are carefully made so that when the arborsS and 9 are in the same, their axes are parallel. The ways 4 and the corresponding under sides of the block 5 riding thereon are also carefully made 'so that the change bearing 12 of the connecting-rod, ends of the arbor 8 being placed in recesses 3, block 5 moved to; proper position and the ends of arbor 9 seated in recesses 7. If the bearings of the connecting rod are correct, there will be a contact of the arbor 8 with the two posts 2 at four points, one at each side of each V-shaped recess 3, and a like contact of the arbor 9 with the two posts 6 at four points, one at each side of the V-shaped recesses 7 If the bearings are not properly alined and positioned with respect to eac other, such four-point'contact of each arbor with its supporting posts will not take place.

For instance the bearing for the crank pin Again the bearings may be Out of true in another plane so that while arbor 8 may be in true four-point contact with the posts 2, arbor 9 will have a two-point contact with one post 6, but have its other end elevated above and completely out of contact engagement with the opposite post 6. In any of these cases, the test shows that the connect ing rod is not correct and should be either corrected or discarded. When either arbor does not have a four-point contact and support in the recesses made in posts :2 and 6, the connecting rod is defective.

By reason of the sliding mount of the block 5, this appliance can be used for testing all lengths of connecting rods between two limits of length and different appliances are not needed for different makes of motor vehicles, except, possibly that different sizes of arbors 8 and 9 may be required. This makes the appliance valuable for garage use where all makes of motor yehicles are brought for repair, The possibility of testing the connecting rods for defect of bearing alinement in all planes thereof is a further valuable feature of our invention, as the central axes of the bearings should be parallel in every respect. The appliance is relatively simple to construct, is durable, having no parts to get out of order and in practice has proved the merits described for it. The appended claims define the intern tion and we consider ourselves entitled to all forms of construction coming within their scope.

V e claim:

1. An appliance of the class described. comprising an elongated base haying parallel guide ways at one end portion extending longitudinally of the base and formed at its other end with two spaced apart, upwardly projecting posts having V-shaped recesses cut in the upper ends thereof, said recesses being in alignment and extending at right angles to said guideways, and a block slidably mounted on said guide ways, said block having two spaced apart upwardly project ing posts formed therewith, said posts having if-shaped aligned recesses cut in the upper ends thereof, said last-named V-shaped recesses being parallel to said first-named V-shaped recesses, substantially as and for the purposes described.

An appliance of the class described, comprising an elongated base, a pair of posts one at each side and at one end of the base extending upwardly from the base and formed with V-shaped recesses in their upper ends, said recesses being in alignment and extending at right angles to the length of the base a second pair of posts located one at each side of the base and projecting upwardly therefrom, and means for carrying said last mentioned posts for longitudinal adjustment on the base. said second pair of posts likewise being formed with V-shaped aligned recesses in their upper ends in horizontal alineinent, said last named V-shaped recesses being parallel to said first named V-shaped recesses, substantially as described.

3. An appliance of the class described, comprising base at one end having a relatively narrow downturned lip, a pair of posts at the opposite end of the base and located one at each side thereof, the lower ends of the posts being formed with down wardly extci'iding supporting lips whereby a three-point support is made for the base, and a second pair of posts located a distance from the first pair, one at each side of the base, the upper ends of each pair of posts being formed with arbor receiving recesses, the recesses in each pair of posts being located in alignment and at right angles to the length of the base, said recesses in the first named pair of posts paralle ing those in the second pair of posts, substantially as and for the purposes described.

In testimony whereof we affix our signatures.

ARTHUR J. KOON. JOHN HOOGERHYDE. JAMES E. COLLINS. 

